# Hydrostor

> Hydrostor is a Canadian long-duration energy storage developer (founded 2010, Toronto, with offices in
> Denver, Melbourne and Adelaide) that builds and operates Advanced Compressed Air Energy Storage (A-CAES)
> facilities. It publishes no developer program, no SDKs and no API of its own. The only machine-readable
> interface it exposes is the WordPress core REST content API behind hydrostor.ca — anonymous,
> read-only, and carrying the A-CAES project portfolio, the newsroom archive and the media library.
> This file was generated by API Evangelist on 2026-08-22 from artifacts derived from that live surface;
> Hydrostor does not publish an llms.txt (https://hydrostor.ca/llms.txt returns 404).

Base URL: https://hydrostor.ca/wp-json
Authentication: none for reads. Writes require a WordPress application password with no public issuance path.
Rate limits: none advertised. No RateLimit-*, X-RateLimit-* or Retry-After header is returned. Self-throttle.

## APIs

- [Projects API](https://hydrostor.ca/wp-json/wp/v2/project): The A-CAES project portfolio — Goderich, Willow Rock, Silver City, Quinte, Wellington, Copper Valley. 6 records. The only Hydrostor-specific resource on the surface.
- [Posts API](https://hydrostor.ca/wp-json/wp/v2/posts): Newsroom archive — 172 posts across Press Release (54), Featured Coverage (96) and Insights (24).
- [Pages API](https://hydrostor.ca/wp-json/wp/v2/pages): 22 static marketing and policy pages.
- [Media API](https://hydrostor.ca/wp-json/wp/v2/media): 736 attachments with generated size variants.
- [Taxonomy API](https://hydrostor.ca/wp-json/wp/v2/categories): Newsroom categories (4 terms). The tag, project_category and project_tag vocabularies are registered but carry zero terms.
- [Search API](https://hydrostor.ca/wp-json/wp/v2/search): Cross-content search over 200 objects, returning id/title/url/type/subtype.
- [Discovery API](https://hydrostor.ca/wp-json/): Self-describing route index — 340 routes across 18 namespaces, plus registered types, taxonomies, statuses and public authors.
- [oEmbed API](https://hydrostor.ca/wp-json/oembed/1.0/embed): oEmbed 1.0 rich metadata for any hydrostor.ca URL.
- [SEO Metadata API](https://hydrostor.ca/wp-json/yoast/v1/get_head): Rendered head metadata and parsed schema.org JSON-LD for any hydrostor.ca URL.

## Specs

- [Projects OpenAPI](https://raw.githubusercontent.com/api-evangelist/hydrostor/main/openapi/hydrostor-projects-api-openapi.yml)
- [Posts OpenAPI](https://raw.githubusercontent.com/api-evangelist/hydrostor/main/openapi/hydrostor-posts-api-openapi.yml)
- [Pages OpenAPI](https://raw.githubusercontent.com/api-evangelist/hydrostor/main/openapi/hydrostor-pages-api-openapi.yml)
- [Media OpenAPI](https://raw.githubusercontent.com/api-evangelist/hydrostor/main/openapi/hydrostor-media-api-openapi.yml)
- [Taxonomy OpenAPI](https://raw.githubusercontent.com/api-evangelist/hydrostor/main/openapi/hydrostor-taxonomy-api-openapi.yml)
- [Search OpenAPI](https://raw.githubusercontent.com/api-evangelist/hydrostor/main/openapi/hydrostor-search-api-openapi.yml)
- [Discovery OpenAPI](https://raw.githubusercontent.com/api-evangelist/hydrostor/main/openapi/hydrostor-discovery-api-openapi.yml)
- [oEmbed OpenAPI](https://raw.githubusercontent.com/api-evangelist/hydrostor/main/openapi/hydrostor-oembed-api-openapi.yml)
- [SEO OpenAPI](https://raw.githubusercontent.com/api-evangelist/hydrostor/main/openapi/hydrostor-seo-api-openapi.yml)
- [APIs.json](https://raw.githubusercontent.com/api-evangelist/hydrostor/main/apis.yml)

## Operating guidance

- [Conventions](https://raw.githubusercontent.com/api-evangelist/hydrostor/main/conventions/hydrostor-conventions.yml): pagination, sparse fields, context, caching, error envelope, reversibility (na — read-only).
- [Error catalog](https://raw.githubusercontent.com/api-evangelist/hydrostor/main/errors/hydrostor-problem-types.yml): observed codes, not RFC 9457.
- [Authentication](https://raw.githubusercontent.com/api-evangelist/hydrostor/main/authentication/hydrostor-authentication.yml)
- [Data model](https://raw.githubusercontent.com/api-evangelist/hydrostor/main/data-model/hydrostor-data-model.yml)
- [Lifecycle](https://raw.githubusercontent.com/api-evangelist/hydrostor/main/lifecycle/hydrostor-lifecycle.yml): no versioning policy, no deprecation policy, no status page, no changelog.
- [Rate limits](https://raw.githubusercontent.com/api-evangelist/hydrostor/main/rate-limits/hydrostor-rate-limits.yml): none published.
- [Examples](https://raw.githubusercontent.com/api-evangelist/hydrostor/main/examples/hydrostor-examples.yml): real captured request/response pairs.
- [Agent skills](https://raw.githubusercontent.com/api-evangelist/hydrostor/main/skills/_index.yml): browse the project portfolio; track the newsroom.

## Company

- [Website](https://hydrostor.ca/)
- [Company](https://hydrostor.ca/our-company/)
- [Technology](https://hydrostor.ca/technology/)
- [Projects](https://hydrostor.ca/projects/)
- [Geology explainer](https://hydrostor.ca/geology/)
- [Use cases](https://hydrostor.ca/use-cases/)
- [Newsroom](https://hydrostor.ca/media/)
- [Newsroom RSS](https://hydrostor.ca/feed/)
- [Media kit](https://hydrostor.ca/media-kit/)
- [Careers](https://hydrostor.ca/careers/)
- [Contact](https://hydrostor.ca/contact/)
- [AB1305 climate disclosure](https://hydrostor.ca/ab1305-disclosure/)
- [Terms of Use](https://hydrostor.ca/terms-of-use/)
- [Privacy Policy](https://hydrostor.ca/privacy-policy/)

## Not available

- No developer portal, documentation, API reference, getting-started guide or Postman collection.
- No OpenAPI, AsyncAPI, GraphQL SDL or WSDL published by Hydrostor. The specs above were derived by API Evangelist from the live surface.
- No MCP server (mcp.hydrostor.ca does not resolve; /.well-known/mcp returns 404).
- No A2A agent card (/.well-known/agent-card.json and /.well-known/agent.json both return 404).
- No /.well-known/ documents at all, no security.txt, no bug bounty, no trust center.
- No SDKs or CLI in any package registry, and no GitHub organization.
- No webhooks, events or streaming surface.
- No pricing, plans or signup — Hydrostor sells storage capacity under negotiated contracts, not API access.